I have never seen a lean (say under 11%) person with an ass that was too big. I find it hard to believe that deads would create disproportion unless someone is storing fat there and lack of muscle is hiding it (which I doubt is your case casual). Also I don't see how you can get big legs without a big ass - squats, deads, and leg presses all hit it hard. Or a big ass without big legs, for that matter.
It's possible that at first, the glutes stick out more than the hamstrings, but then the hamstrings 'catch up.' spatts and coolcolj (i think) have commented on how growing hamstrings eventually kill the 'bubble' of the butt by thickening the legs to the same proportions as the glutes.
I'm sure you know what you're doing casual, but I don't think your results are normal.
It's possible that at first, the glutes stick out more than the hamstrings, but then the hamstrings 'catch up.' spatts and coolcolj (i think) have commented on how growing hamstrings eventually kill the 'bubble' of the butt by thickening the legs to the same proportions as the glutes.
I'm sure you know what you're doing casual, but I don't think your results are normal.